<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
      <!-- <>头部警告驱 -->
      <el-alert
        title="注意：只允许为第三级分类设置相关参数"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类:</span>
          <!-- 选择商品分类的级联选择 -->
          <el-cascader
            v-model="selectCateKeys"
            :options="catelist"
            :props="cateProps"
            props.expandTrigger
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisable"
            @click="adddialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <!-- //循环渲染tag标签 -->
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                  >{{ item }}
                  </el-tag
                >
                <!-- //输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisable"
            @click="adddialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态参数表格 -->
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <!-- //循环渲染tag标签 -->
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                  >{{ item }}
                  </el-tag
                >
                <!-- //输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
          </el-table>
          
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- //添加参数对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="adddialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 添加参数的对话框 -->
      <el-form
        ref="addformRef"
        :model="addform"
        label-width="100px"
        :rules="addFormRules"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addform.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="adddialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- //修改参数对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editdialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 修改参数的对话框 -->
      <el-form
        ref="editformRef"
        :model="editform"
        label-width="100px"
        :rules="editFormRules"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editform.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editdialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //商品分类列表
      catelist: [],
      //级联选择框的配置对象
      cateProps: {
        value: 'cat_id', //选中的值
        label: 'cat_name', //看到的属性值
        children: 'children', //父子节点之间的的嵌套关系
      },
      //v-mode 将选中的数组的id双向绑定到这里
      selectCateKeys: [],
      //被激活页签名称
      activeName: 'many',
      //动态属性的数据
      manyTableData: [],
      //静态属性的数据
      onlyTableData: [],
      // 控制添加对话框的显示隐藏
      adddialogVisible: false,
      //添加参数的表单对象
      addform: {
        attr_name: '',
      },
      //添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },
      //控制修改对话框的现实与隐藏
      editdialogVisible: false,
      //修改的表单数据
      editform: {},
      //修改表单的规则
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
        ],
      },
     
    }
  },
  created() {
    //获取所有商品数据分类
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.catelist = res.data
    },
    //级联选择框选中框变化，会触发
    handleChange() {
      this.getParamsData()
    },
    //tab页签点击事件的处理函数
    handleTabClick() {
      this.getParamsData()
    },
    //获取参数的列表数据
    async getParamsData() {
      if (this.selectCateKeys.length !== 3) {
        this.selectCateKeys = []
        this.manyTableData=[]
        this.onlyTableData=[]
        return
      }
      //根据所选分类的id 和当前所处所处的面板，获取对象的参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateid}/attributes`,
        { params: { sel: this.activeName } }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      console.log(res.data)
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals
          ? item.attr_vals.split(' ')
          : []
          //控制文本框的显示隐藏
          item.inputVisible =false
          //文本框输入的
          item.inputValue=''
      })
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      }
      this.onlyTableData = res.data
    },
    // 监听对话框的关闭事件
    addDialogClosed() {
      this.$refs.addformRef.resetFields()
    },
    addParams() {
      this.$refs.addformRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateid}/attributes`,
          { attr_name: this.addform.attr_name, attr_sel: this.activeName }
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.$message.success('添加参数成功')
        this.adddialogVisible = false
        this.getParamsData()
      })
    },
    //点击按钮展示修改对话框
    async showEditDialog(attr_id) {
      const { data: res } = await this.$http.get(
        `categories/${this.cateid}/attributes/${attr_id}`,
        { params: { attr_sel: this.activeName } }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('获取参数失败')
      }
      this.editform = res.data
      this.editdialogVisible = true
    },
    //监听对话框关闭事件，清空对话框
    editDialogClosed() {
      this.$refs.editformRef.resetFields()
    },
    //点击按钮修改参数信息
    editParams() {
      this.$refs.editformRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          `categories/${this.cateid}/attributes/${this.editform.attr_id}`,
          { attr_name: this.editform.attr_name, attr_sel: this.activeName }
        )
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败失败')
        }
        this.$message.success('修改参数成功')
        this.getParamsData()
        this.editdialogVisible = false
      })
    },
    //根据id 删除对应参数项
    async removeParams(attr_id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该参数, 是否继续?',
        '警告',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      const { data: res } = await this.$http.delete(
        `categories/${this.cateid}/attributes/${attr_id}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败')
      }
      this.$message.success('删除分类成功')
      this.getParamsData()
      this.editdialogVisible = false
    },
    //文本框失去焦点，按下或者enter 会触发
    async handleInputConfirm(row){
      if(row.inputValue.trim().length ===0){
        row.inputValue=''
        row.inputVisible=false
        return
      }
      //如果没有return 则输入的内容，后续在处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue=''
      row.inputVisible=false
      //发起请求保存操作
      this.saveAttrVals(row)
    },
    //点击按钮展示文本输入框
    showInput(row){
      row.inputVisible =true
    },
    //删除对应的参数可选项
    handleClose(i,row){
      row.attr_vals.splice(i,1)
      this.saveAttrVals(row)
    },
    //对attr-vals的操作保存到数据库
    async saveAttrVals(row){
      const { data: res } = await this.$http.put(
        `categories/${this.cateid}/attributes/${row.attr_id}`,
        { attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals:row.attr_vals.join(' ')}
      )
      if (res.meta.status !== 200) {
        return this.$message.error('修改失败')
      }
      this.$message.success('修改参数成功')
    }
  },
  computed: {
    //如果按钮需要被禁用，则返回true，否则false
    isBtnDisable() {
      if (this.selectCateKeys.length !== 3) {
        return true
      }
      return false
    },
    //当前选中的三级分类id
    cateid() {
      if (this.selectCateKeys.length === 3) {
        return this.selectCateKeys[2]
      }
      return null
    },
    //动态计算标题文本
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    },
  },
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 15px;
}
.input-new-tag{
  width:120px
}
</style>